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1069 lines
23 KiB
1069 lines
23 KiB
/**
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* @version 1.1.1
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*
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* @desc Load files in LWO3 and LWO2 format on Three.js
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*
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* LWO3 format specification:
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* https://static.lightwave3d.com/sdk/2019/html/filefmts/lwo3.html
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*
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* LWO2 format specification:
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* https://static.lightwave3d.com/sdk/2019/html/filefmts/lwo2.html
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*
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**/
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import {
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AddOperation,
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BackSide,
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BufferAttribute,
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BufferGeometry,
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ClampToEdgeWrapping,
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Color,
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DoubleSide,
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EquirectangularReflectionMapping,
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EquirectangularRefractionMapping,
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FileLoader,
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Float32BufferAttribute,
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FrontSide,
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LineBasicMaterial,
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LineSegments,
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Loader,
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Mesh,
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MeshPhongMaterial,
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MeshPhysicalMaterial,
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MeshStandardMaterial,
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MirroredRepeatWrapping,
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Points,
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PointsMaterial,
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RepeatWrapping,
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TextureLoader,
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Vector2
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} from 'three';
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import { IFFParser } from './lwo/IFFParser.js';
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let _lwoTree;
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class LWOLoader extends Loader {
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constructor( manager, parameters = {} ) {
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super( manager );
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this.resourcePath = ( parameters.resourcePath !== undefined ) ? parameters.resourcePath : '';
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}
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load( url, onLoad, onProgress, onError ) {
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const scope = this;
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const path = ( scope.path === '' ) ? extractParentUrl( url, 'Objects' ) : scope.path;
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// give the mesh a default name based on the filename
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const modelName = url.split( path ).pop().split( '.' )[ 0 ];
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const loader = new FileLoader( this.manager );
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loader.setPath( scope.path );
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loader.setResponseType( 'arraybuffer' );
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loader.load( url, function ( buffer ) {
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// console.time( 'Total parsing: ' );
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try {
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onLoad( scope.parse( buffer, path, modelName ) );
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} catch ( e ) {
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if ( onError ) {
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onError( e );
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} else {
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console.error( e );
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}
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scope.manager.itemError( url );
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}
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// console.timeEnd( 'Total parsing: ' );
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}, onProgress, onError );
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}
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parse( iffBuffer, path, modelName ) {
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_lwoTree = new IFFParser().parse( iffBuffer );
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// console.log( 'lwoTree', lwoTree );
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const textureLoader = new TextureLoader( this.manager ).setPath( this.resourcePath || path ).setCrossOrigin( this.crossOrigin );
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return new LWOTreeParser( textureLoader ).parse( modelName );
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}
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}
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// Parse the lwoTree object
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class LWOTreeParser {
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constructor( textureLoader ) {
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this.textureLoader = textureLoader;
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}
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parse( modelName ) {
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this.materials = new MaterialParser( this.textureLoader ).parse();
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this.defaultLayerName = modelName;
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this.meshes = this.parseLayers();
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return {
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materials: this.materials,
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meshes: this.meshes,
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};
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}
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parseLayers() {
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// array of all meshes for building hierarchy
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const meshes = [];
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// final array containing meshes with scene graph hierarchy set up
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const finalMeshes = [];
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const geometryParser = new GeometryParser();
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const scope = this;
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_lwoTree.layers.forEach( function ( layer ) {
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const geometry = geometryParser.parse( layer.geometry, layer );
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const mesh = scope.parseMesh( geometry, layer );
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meshes[ layer.number ] = mesh;
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if ( layer.parent === - 1 ) finalMeshes.push( mesh );
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else meshes[ layer.parent ].add( mesh );
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} );
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this.applyPivots( finalMeshes );
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return finalMeshes;
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}
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parseMesh( geometry, layer ) {
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let mesh;
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const materials = this.getMaterials( geometry.userData.matNames, layer.geometry.type );
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this.duplicateUVs( geometry, materials );
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if ( layer.geometry.type === 'points' ) mesh = new Points( geometry, materials );
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else if ( layer.geometry.type === 'lines' ) mesh = new LineSegments( geometry, materials );
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else mesh = new Mesh( geometry, materials );
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if ( layer.name ) mesh.name = layer.name;
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else mesh.name = this.defaultLayerName + '_layer_' + layer.number;
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mesh.userData.pivot = layer.pivot;
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return mesh;
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}
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// TODO: may need to be reversed in z to convert LWO to three.js coordinates
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applyPivots( meshes ) {
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meshes.forEach( function ( mesh ) {
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mesh.traverse( function ( child ) {
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const pivot = child.userData.pivot;
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child.position.x += pivot[ 0 ];
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child.position.y += pivot[ 1 ];
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child.position.z += pivot[ 2 ];
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if ( child.parent ) {
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const parentPivot = child.parent.userData.pivot;
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child.position.x -= parentPivot[ 0 ];
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child.position.y -= parentPivot[ 1 ];
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child.position.z -= parentPivot[ 2 ];
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}
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} );
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} );
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}
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getMaterials( namesArray, type ) {
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const materials = [];
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const scope = this;
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namesArray.forEach( function ( name, i ) {
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materials[ i ] = scope.getMaterialByName( name );
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} );
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// convert materials to line or point mats if required
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if ( type === 'points' || type === 'lines' ) {
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materials.forEach( function ( mat, i ) {
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const spec = {
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color: mat.color,
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};
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if ( type === 'points' ) {
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spec.size = 0.1;
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spec.map = mat.map;
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materials[ i ] = new PointsMaterial( spec );
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} else if ( type === 'lines' ) {
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materials[ i ] = new LineBasicMaterial( spec );
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}
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} );
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}
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// if there is only one material, return that directly instead of array
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const filtered = materials.filter( Boolean );
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if ( filtered.length === 1 ) return filtered[ 0 ];
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return materials;
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}
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getMaterialByName( name ) {
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return this.materials.filter( function ( m ) {
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return m.name === name;
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} )[ 0 ];
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}
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// If the material has an aoMap, duplicate UVs
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duplicateUVs( geometry, materials ) {
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let duplicateUVs = false;
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if ( ! Array.isArray( materials ) ) {
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if ( materials.aoMap ) duplicateUVs = true;
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} else {
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materials.forEach( function ( material ) {
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if ( material.aoMap ) duplicateUVs = true;
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} );
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}
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if ( ! duplicateUVs ) return;
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geometry.setAttribute( 'uv2', new BufferAttribute( geometry.attributes.uv.array, 2 ) );
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}
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}
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class MaterialParser {
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constructor( textureLoader ) {
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this.textureLoader = textureLoader;
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}
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parse() {
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const materials = [];
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this.textures = {};
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for ( const name in _lwoTree.materials ) {
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if ( _lwoTree.format === 'LWO3' ) {
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materials.push( this.parseMaterial( _lwoTree.materials[ name ], name, _lwoTree.textures ) );
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} else if ( _lwoTree.format === 'LWO2' ) {
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materials.push( this.parseMaterialLwo2( _lwoTree.materials[ name ], name, _lwoTree.textures ) );
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}
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}
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return materials;
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}
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parseMaterial( materialData, name, textures ) {
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let params = {
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name: name,
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side: this.getSide( materialData.attributes ),
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flatShading: this.getSmooth( materialData.attributes ),
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};
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const connections = this.parseConnections( materialData.connections, materialData.nodes );
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const maps = this.parseTextureNodes( connections.maps );
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this.parseAttributeImageMaps( connections.attributes, textures, maps, materialData.maps );
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const attributes = this.parseAttributes( connections.attributes, maps );
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this.parseEnvMap( connections, maps, attributes );
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params = Object.assign( maps, params );
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params = Object.assign( params, attributes );
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const materialType = this.getMaterialType( connections.attributes );
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if ( materialType !== MeshPhongMaterial ) delete params.refractionRatio; // PBR materials do not support "refractionRatio"
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return new materialType( params );
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}
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parseMaterialLwo2( materialData, name/*, textures*/ ) {
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let params = {
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name: name,
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side: this.getSide( materialData.attributes ),
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flatShading: this.getSmooth( materialData.attributes ),
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};
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const attributes = this.parseAttributes( materialData.attributes, {} );
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params = Object.assign( params, attributes );
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return new MeshPhongMaterial( params );
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}
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// Note: converting from left to right handed coords by switching x -> -x in vertices, and
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// then switching mat FrontSide -> BackSide
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// NB: this means that FrontSide and BackSide have been switched!
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getSide( attributes ) {
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if ( ! attributes.side ) return BackSide;
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switch ( attributes.side ) {
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case 0:
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case 1:
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return BackSide;
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case 2: return FrontSide;
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case 3: return DoubleSide;
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}
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}
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getSmooth( attributes ) {
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if ( ! attributes.smooth ) return true;
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return ! attributes.smooth;
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}
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parseConnections( connections, nodes ) {
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const materialConnections = {
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maps: {}
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};
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const inputName = connections.inputName;
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const inputNodeName = connections.inputNodeName;
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const nodeName = connections.nodeName;
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const scope = this;
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inputName.forEach( function ( name, index ) {
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if ( name === 'Material' ) {
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const matNode = scope.getNodeByRefName( inputNodeName[ index ], nodes );
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materialConnections.attributes = matNode.attributes;
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materialConnections.envMap = matNode.fileName;
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materialConnections.name = inputNodeName[ index ];
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}
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} );
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nodeName.forEach( function ( name, index ) {
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if ( name === materialConnections.name ) {
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materialConnections.maps[ inputName[ index ] ] = scope.getNodeByRefName( inputNodeName[ index ], nodes );
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}
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} );
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return materialConnections;
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}
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getNodeByRefName( refName, nodes ) {
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for ( const name in nodes ) {
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if ( nodes[ name ].refName === refName ) return nodes[ name ];
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}
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}
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parseTextureNodes( textureNodes ) {
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const maps = {};
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for ( const name in textureNodes ) {
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const node = textureNodes[ name ];
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const path = node.fileName;
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if ( ! path ) return;
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const texture = this.loadTexture( path );
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if ( node.widthWrappingMode !== undefined ) texture.wrapS = this.getWrappingType( node.widthWrappingMode );
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if ( node.heightWrappingMode !== undefined ) texture.wrapT = this.getWrappingType( node.heightWrappingMode );
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switch ( name ) {
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case 'Color':
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maps.map = texture;
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break;
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case 'Roughness':
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maps.roughnessMap = texture;
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maps.roughness = 1;
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break;
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case 'Specular':
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maps.specularMap = texture;
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maps.specular = 0xffffff;
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break;
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case 'Luminous':
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maps.emissiveMap = texture;
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maps.emissive = 0x808080;
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break;
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case 'Luminous Color':
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maps.emissive = 0x808080;
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break;
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case 'Metallic':
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maps.metalnessMap = texture;
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maps.metalness = 1;
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break;
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case 'Transparency':
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case 'Alpha':
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maps.alphaMap = texture;
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maps.transparent = true;
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break;
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case 'Normal':
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maps.normalMap = texture;
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if ( node.amplitude !== undefined ) maps.normalScale = new Vector2( node.amplitude, node.amplitude );
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break;
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case 'Bump':
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maps.bumpMap = texture;
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break;
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}
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}
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// LWO BSDF materials can have both spec and rough, but this is not valid in three
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if ( maps.roughnessMap && maps.specularMap ) delete maps.specularMap;
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return maps;
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}
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// maps can also be defined on individual material attributes, parse those here
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// This occurs on Standard (Phong) surfaces
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parseAttributeImageMaps( attributes, textures, maps ) {
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for ( const name in attributes ) {
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const attribute = attributes[ name ];
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if ( attribute.maps ) {
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const mapData = attribute.maps[ 0 ];
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const path = this.getTexturePathByIndex( mapData.imageIndex, textures );
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if ( ! path ) return;
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const texture = this.loadTexture( path );
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if ( mapData.wrap !== undefined ) texture.wrapS = this.getWrappingType( mapData.wrap.w );
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if ( mapData.wrap !== undefined ) texture.wrapT = this.getWrappingType( mapData.wrap.h );
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switch ( name ) {
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case 'Color':
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maps.map = texture;
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break;
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case 'Diffuse':
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maps.aoMap = texture;
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break;
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case 'Roughness':
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maps.roughnessMap = texture;
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maps.roughness = 1;
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break;
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case 'Specular':
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maps.specularMap = texture;
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maps.specular = 0xffffff;
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break;
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case 'Luminosity':
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maps.emissiveMap = texture;
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maps.emissive = 0x808080;
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break;
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case 'Metallic':
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maps.metalnessMap = texture;
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maps.metalness = 1;
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break;
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case 'Transparency':
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case 'Alpha':
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maps.alphaMap = texture;
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maps.transparent = true;
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break;
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case 'Normal':
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maps.normalMap = texture;
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break;
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case 'Bump':
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maps.bumpMap = texture;
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break;
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}
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}
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}
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}
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parseAttributes( attributes, maps ) {
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const params = {};
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// don't use color data if color map is present
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if ( attributes.Color && ! maps.map ) {
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params.color = new Color().fromArray( attributes.Color.value );
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} else params.color = new Color();
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if ( attributes.Transparency && attributes.Transparency.value !== 0 ) {
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params.opacity = 1 - attributes.Transparency.value;
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params.transparent = true;
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}
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if ( attributes[ 'Bump Height' ] ) params.bumpScale = attributes[ 'Bump Height' ].value * 0.1;
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this.parsePhysicalAttributes( params, attributes, maps );
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this.parseStandardAttributes( params, attributes, maps );
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this.parsePhongAttributes( params, attributes, maps );
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return params;
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}
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parsePhysicalAttributes( params, attributes/*, maps*/ ) {
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if ( attributes.Clearcoat && attributes.Clearcoat.value > 0 ) {
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params.clearcoat = attributes.Clearcoat.value;
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if ( attributes[ 'Clearcoat Gloss' ] ) {
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params.clearcoatRoughness = 0.5 * ( 1 - attributes[ 'Clearcoat Gloss' ].value );
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}
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}
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}
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parseStandardAttributes( params, attributes, maps ) {
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if ( attributes.Luminous ) {
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params.emissiveIntensity = attributes.Luminous.value;
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if ( attributes[ 'Luminous Color' ] && ! maps.emissive ) {
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params.emissive = new Color().fromArray( attributes[ 'Luminous Color' ].value );
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} else {
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params.emissive = new Color( 0x808080 );
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}
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}
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if ( attributes.Roughness && ! maps.roughnessMap ) params.roughness = attributes.Roughness.value;
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if ( attributes.Metallic && ! maps.metalnessMap ) params.metalness = attributes.Metallic.value;
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}
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parsePhongAttributes( params, attributes, maps ) {
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if ( attributes[ 'Refraction Index' ] ) params.refractionRatio = 0.98 / attributes[ 'Refraction Index' ].value;
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|
|
if ( attributes.Diffuse ) params.color.multiplyScalar( attributes.Diffuse.value );
|
|
|
|
if ( attributes.Reflection ) {
|
|
|
|
params.reflectivity = attributes.Reflection.value;
|
|
params.combine = AddOperation;
|
|
|
|
}
|
|
|
|
if ( attributes.Luminosity ) {
|
|
|
|
params.emissiveIntensity = attributes.Luminosity.value;
|
|
|
|
if ( ! maps.emissiveMap && ! maps.map ) {
|
|
|
|
params.emissive = params.color;
|
|
|
|
} else {
|
|
|
|
params.emissive = new Color( 0x808080 );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// parse specular if there is no roughness - we will interpret the material as 'Phong' in this case
|
|
if ( ! attributes.Roughness && attributes.Specular && ! maps.specularMap ) {
|
|
|
|
if ( attributes[ 'Color Highlight' ] ) {
|
|
|
|
params.specular = new Color().setScalar( attributes.Specular.value ).lerp( params.color.clone().multiplyScalar( attributes.Specular.value ), attributes[ 'Color Highlight' ].value );
|
|
|
|
} else {
|
|
|
|
params.specular = new Color().setScalar( attributes.Specular.value );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ( params.specular && attributes.Glossiness ) params.shininess = 7 + Math.pow( 2, attributes.Glossiness.value * 12 + 2 );
|
|
|
|
}
|
|
|
|
parseEnvMap( connections, maps, attributes ) {
|
|
|
|
if ( connections.envMap ) {
|
|
|
|
const envMap = this.loadTexture( connections.envMap );
|
|
|
|
if ( attributes.transparent && attributes.opacity < 0.999 ) {
|
|
|
|
envMap.mapping = EquirectangularRefractionMapping;
|
|
|
|
// Reflectivity and refraction mapping don't work well together in Phong materials
|
|
if ( attributes.reflectivity !== undefined ) {
|
|
|
|
delete attributes.reflectivity;
|
|
delete attributes.combine;
|
|
|
|
}
|
|
|
|
if ( attributes.metalness !== undefined ) {
|
|
|
|
attributes.metalness = 1; // For most transparent materials metalness should be set to 1 if not otherwise defined. If set to 0 no refraction will be visible
|
|
|
|
}
|
|
|
|
attributes.opacity = 1; // transparency fades out refraction, forcing opacity to 1 ensures a closer visual match to the material in Lightwave.
|
|
|
|
} else envMap.mapping = EquirectangularReflectionMapping;
|
|
|
|
maps.envMap = envMap;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// get texture defined at top level by its index
|
|
getTexturePathByIndex( index ) {
|
|
|
|
let fileName = '';
|
|
|
|
if ( ! _lwoTree.textures ) return fileName;
|
|
|
|
_lwoTree.textures.forEach( function ( texture ) {
|
|
|
|
if ( texture.index === index ) fileName = texture.fileName;
|
|
|
|
} );
|
|
|
|
return fileName;
|
|
|
|
}
|
|
|
|
loadTexture( path ) {
|
|
|
|
if ( ! path ) return null;
|
|
|
|
const texture = this.textureLoader.load(
|
|
path,
|
|
undefined,
|
|
undefined,
|
|
function () {
|
|
|
|
console.warn( 'LWOLoader: non-standard resource hierarchy. Use \`resourcePath\` parameter to specify root content directory.' );
|
|
|
|
}
|
|
);
|
|
|
|
return texture;
|
|
|
|
}
|
|
|
|
// 0 = Reset, 1 = Repeat, 2 = Mirror, 3 = Edge
|
|
getWrappingType( num ) {
|
|
|
|
switch ( num ) {
|
|
|
|
case 0:
|
|
console.warn( 'LWOLoader: "Reset" texture wrapping type is not supported in three.js' );
|
|
return ClampToEdgeWrapping;
|
|
case 1: return RepeatWrapping;
|
|
case 2: return MirroredRepeatWrapping;
|
|
case 3: return ClampToEdgeWrapping;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
getMaterialType( nodeData ) {
|
|
|
|
if ( nodeData.Clearcoat && nodeData.Clearcoat.value > 0 ) return MeshPhysicalMaterial;
|
|
if ( nodeData.Roughness ) return MeshStandardMaterial;
|
|
return MeshPhongMaterial;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
class GeometryParser {
|
|
|
|
parse( geoData, layer ) {
|
|
|
|
const geometry = new BufferGeometry();
|
|
|
|
geometry.setAttribute( 'position', new Float32BufferAttribute( geoData.points, 3 ) );
|
|
|
|
const indices = this.splitIndices( geoData.vertexIndices, geoData.polygonDimensions );
|
|
geometry.setIndex( indices );
|
|
|
|
this.parseGroups( geometry, geoData );
|
|
|
|
geometry.computeVertexNormals();
|
|
|
|
this.parseUVs( geometry, layer, indices );
|
|
this.parseMorphTargets( geometry, layer, indices );
|
|
|
|
// TODO: z may need to be reversed to account for coordinate system change
|
|
geometry.translate( - layer.pivot[ 0 ], - layer.pivot[ 1 ], - layer.pivot[ 2 ] );
|
|
|
|
// let userData = geometry.userData;
|
|
// geometry = geometry.toNonIndexed()
|
|
// geometry.userData = userData;
|
|
|
|
return geometry;
|
|
|
|
}
|
|
|
|
// split quads into tris
|
|
splitIndices( indices, polygonDimensions ) {
|
|
|
|
const remappedIndices = [];
|
|
|
|
let i = 0;
|
|
polygonDimensions.forEach( function ( dim ) {
|
|
|
|
if ( dim < 4 ) {
|
|
|
|
for ( let k = 0; k < dim; k ++ ) remappedIndices.push( indices[ i + k ] );
|
|
|
|
} else if ( dim === 4 ) {
|
|
|
|
remappedIndices.push(
|
|
indices[ i ],
|
|
indices[ i + 1 ],
|
|
indices[ i + 2 ],
|
|
|
|
indices[ i ],
|
|
indices[ i + 2 ],
|
|
indices[ i + 3 ]
|
|
|
|
);
|
|
|
|
} else if ( dim > 4 ) {
|
|
|
|
for ( let k = 1; k < dim - 1; k ++ ) {
|
|
|
|
remappedIndices.push( indices[ i ], indices[ i + k ], indices[ i + k + 1 ] );
|
|
|
|
}
|
|
|
|
console.warn( 'LWOLoader: polygons with greater than 4 sides are not supported' );
|
|
|
|
}
|
|
|
|
i += dim;
|
|
|
|
} );
|
|
|
|
return remappedIndices;
|
|
|
|
}
|
|
|
|
// NOTE: currently ignoring poly indices and assuming that they are intelligently ordered
|
|
parseGroups( geometry, geoData ) {
|
|
|
|
const tags = _lwoTree.tags;
|
|
const matNames = [];
|
|
|
|
let elemSize = 3;
|
|
if ( geoData.type === 'lines' ) elemSize = 2;
|
|
if ( geoData.type === 'points' ) elemSize = 1;
|
|
|
|
const remappedIndices = this.splitMaterialIndices( geoData.polygonDimensions, geoData.materialIndices );
|
|
|
|
let indexNum = 0; // create new indices in numerical order
|
|
const indexPairs = {}; // original indices mapped to numerical indices
|
|
|
|
let prevMaterialIndex;
|
|
let materialIndex;
|
|
|
|
let prevStart = 0;
|
|
let currentCount = 0;
|
|
|
|
for ( let i = 0; i < remappedIndices.length; i += 2 ) {
|
|
|
|
materialIndex = remappedIndices[ i + 1 ];
|
|
|
|
if ( i === 0 ) matNames[ indexNum ] = tags[ materialIndex ];
|
|
|
|
if ( prevMaterialIndex === undefined ) prevMaterialIndex = materialIndex;
|
|
|
|
if ( materialIndex !== prevMaterialIndex ) {
|
|
|
|
let currentIndex;
|
|
if ( indexPairs[ tags[ prevMaterialIndex ] ] ) {
|
|
|
|
currentIndex = indexPairs[ tags[ prevMaterialIndex ] ];
|
|
|
|
} else {
|
|
|
|
currentIndex = indexNum;
|
|
indexPairs[ tags[ prevMaterialIndex ] ] = indexNum;
|
|
matNames[ indexNum ] = tags[ prevMaterialIndex ];
|
|
indexNum ++;
|
|
|
|
}
|
|
|
|
geometry.addGroup( prevStart, currentCount, currentIndex );
|
|
|
|
prevStart += currentCount;
|
|
|
|
prevMaterialIndex = materialIndex;
|
|
currentCount = 0;
|
|
|
|
}
|
|
|
|
currentCount += elemSize;
|
|
|
|
}
|
|
|
|
// the loop above doesn't add the last group, do that here.
|
|
if ( geometry.groups.length > 0 ) {
|
|
|
|
let currentIndex;
|
|
if ( indexPairs[ tags[ materialIndex ] ] ) {
|
|
|
|
currentIndex = indexPairs[ tags[ materialIndex ] ];
|
|
|
|
} else {
|
|
|
|
currentIndex = indexNum;
|
|
indexPairs[ tags[ materialIndex ] ] = indexNum;
|
|
matNames[ indexNum ] = tags[ materialIndex ];
|
|
|
|
}
|
|
|
|
geometry.addGroup( prevStart, currentCount, currentIndex );
|
|
|
|
}
|
|
|
|
// Mat names from TAGS chunk, used to build up an array of materials for this geometry
|
|
geometry.userData.matNames = matNames;
|
|
|
|
}
|
|
|
|
splitMaterialIndices( polygonDimensions, indices ) {
|
|
|
|
const remappedIndices = [];
|
|
|
|
polygonDimensions.forEach( function ( dim, i ) {
|
|
|
|
if ( dim <= 3 ) {
|
|
|
|
remappedIndices.push( indices[ i * 2 ], indices[ i * 2 + 1 ] );
|
|
|
|
} else if ( dim === 4 ) {
|
|
|
|
remappedIndices.push( indices[ i * 2 ], indices[ i * 2 + 1 ], indices[ i * 2 ], indices[ i * 2 + 1 ] );
|
|
|
|
} else {
|
|
|
|
// ignore > 4 for now
|
|
for ( let k = 0; k < dim - 2; k ++ ) {
|
|
|
|
remappedIndices.push( indices[ i * 2 ], indices[ i * 2 + 1 ] );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} );
|
|
|
|
return remappedIndices;
|
|
|
|
}
|
|
|
|
// UV maps:
|
|
// 1: are defined via index into an array of points, not into a geometry
|
|
// - the geometry is also defined by an index into this array, but the indexes may not match
|
|
// 2: there can be any number of UV maps for a single geometry. Here these are combined,
|
|
// with preference given to the first map encountered
|
|
// 3: UV maps can be partial - that is, defined for only a part of the geometry
|
|
// 4: UV maps can be VMAP or VMAD (discontinuous, to allow for seams). In practice, most
|
|
// UV maps are defined as partially VMAP and partially VMAD
|
|
// VMADs are currently not supported
|
|
parseUVs( geometry, layer ) {
|
|
|
|
// start by creating a UV map set to zero for the whole geometry
|
|
const remappedUVs = Array.from( Array( geometry.attributes.position.count * 2 ), function () {
|
|
|
|
return 0;
|
|
|
|
} );
|
|
|
|
for ( const name in layer.uvs ) {
|
|
|
|
const uvs = layer.uvs[ name ].uvs;
|
|
const uvIndices = layer.uvs[ name ].uvIndices;
|
|
|
|
uvIndices.forEach( function ( i, j ) {
|
|
|
|
remappedUVs[ i * 2 ] = uvs[ j * 2 ];
|
|
remappedUVs[ i * 2 + 1 ] = uvs[ j * 2 + 1 ];
|
|
|
|
} );
|
|
|
|
}
|
|
|
|
geometry.setAttribute( 'uv', new Float32BufferAttribute( remappedUVs, 2 ) );
|
|
|
|
}
|
|
|
|
parseMorphTargets( geometry, layer ) {
|
|
|
|
let num = 0;
|
|
for ( const name in layer.morphTargets ) {
|
|
|
|
const remappedPoints = geometry.attributes.position.array.slice();
|
|
|
|
if ( ! geometry.morphAttributes.position ) geometry.morphAttributes.position = [];
|
|
|
|
const morphPoints = layer.morphTargets[ name ].points;
|
|
const morphIndices = layer.morphTargets[ name ].indices;
|
|
const type = layer.morphTargets[ name ].type;
|
|
|
|
morphIndices.forEach( function ( i, j ) {
|
|
|
|
if ( type === 'relative' ) {
|
|
|
|
remappedPoints[ i * 3 ] += morphPoints[ j * 3 ];
|
|
remappedPoints[ i * 3 + 1 ] += morphPoints[ j * 3 + 1 ];
|
|
remappedPoints[ i * 3 + 2 ] += morphPoints[ j * 3 + 2 ];
|
|
|
|
} else {
|
|
|
|
remappedPoints[ i * 3 ] = morphPoints[ j * 3 ];
|
|
remappedPoints[ i * 3 + 1 ] = morphPoints[ j * 3 + 1 ];
|
|
remappedPoints[ i * 3 + 2 ] = morphPoints[ j * 3 + 2 ];
|
|
|
|
}
|
|
|
|
} );
|
|
|
|
geometry.morphAttributes.position[ num ] = new Float32BufferAttribute( remappedPoints, 3 );
|
|
geometry.morphAttributes.position[ num ].name = name;
|
|
|
|
num ++;
|
|
|
|
}
|
|
|
|
geometry.morphTargetsRelative = false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
// ************** UTILITY FUNCTIONS **************
|
|
|
|
function extractParentUrl( url, dir ) {
|
|
|
|
const index = url.indexOf( dir );
|
|
|
|
if ( index === - 1 ) return './';
|
|
|
|
return url.slice( 0, index );
|
|
|
|
}
|
|
|
|
export { LWOLoader };
|
|
|